MacRumors published a story that Apple has released the second betas of iOS and iPadOS 15.1.
Apple Seeds Second Betas of iOS and iPadOS 15.1 to Developers [Update: Public Beta Available]
Apple today seeded the second betas of upcoming iOS 15.1 and iPadOS 15.1 betas to developers for testing purposes, one week after seeding the first betas and just over a week after releasing iOS 15 and iPadOS 15 to the public.
Apple Seeds Second Betas of iOS and iPadOS 15.1 to Developers [Update: Public Beta Available]
iOS and iPadOS 15.1 can be downloaded through the Apple Developer Center or over the air after the proper profile has been installed on an iPhone or iPad.